Smoke-consumer.



P. C. STOOPES.

SMOKE CONSUMER.

APPLICATION FILED NOV.28,19l7.

1,281,694. Patented Oct. 15, 1918.

2 SHEETSSHEET I.

A TTOR/VEY P. C. STOOPES.

SMOKE CONSUMER.

APPLICATION FILED NOV. 28, 1911.

1,281,694. Patented Oct. 15, 1918.

2 SHEETS-SHEET 2- *nnrrnn srarns rarnnr orrron PIERCE C. STOOPES, OF WILMINGTON, DELAWARE, ASSIGNOR T0 W. N. BEST SMOKE CONSUMING (10., INC.,

015 NEW YORK, N. Y., A CORPORATION OF NEW YORK.

SMOKE-CONSUMER.

Specification of Letters Patent.

Patented Oct. 15, 1918.

Application filed November 28, 1917. Serial No. 204,365.

To all whom it may concern:

Be it known that I, PIERCE C. S'roorns, a citizen of the United States, and resident of Wilmington, in the county of New Castle and State of Delaware, have invented certain new and useful Improvements in Smoke-Consumers, of which the following is a specification.

This invention is an improvement in smoke consiuning furnaces of a type in which air from the atmosphere may be caused to enter the combustion chamber above the fire bed by the action of a jet of gaseous fluid such as steam or compressed air, delivered through an aspirating nozzle properly positioned in respect to the air inlet. The air and steam thus admitted to the fire box mingle rising from the fire bed, whereby complete combustion of the gases is effected, the highest efficiency obtained from the fuel, and the production of smoke prevented. The formation of such smoke and unconsumed gases is the most rapid when fuel is first delivered to the fire box and decreases as the burning of said fuel decreases. For that reason, it is desired to admit the air in steam to the com bustion chamber as soon as the door is opened for the purpose of firing and to continue such air admission for a predetermined time after the termination of the firing operation and the closing of the door. Various mechanisms have been designed for accomplishing this result but so far as I know, all have been open to various objections including complication, large expense, fragile parts, variable operation, and. lack of adaptability to furnaces already in operation.

The object of my invention is to provide a simple mechanism which will avoid the various objections above noted. Merely as an example, I have illustrated an embodiment of my invention particularly adapted for use in connection with a construction of the type shown in the V. N. Best Patent No. 1,110,732, issued May 25th, 1915.- It will of course be understood that various changes may be made in the details of construction to adapt it to other types of furnaces.

In the accompanying drawings,

' Figure 1 is a'front elevation of a portion of a furnace equipped with my improved mechanism with the unconsumed gases 2 is a side elevation thereof;

Flg. 3 is a front elevation corresponding to a portion of Fig. 1 but on a very much larger scale and showing the valve operated by the furnace door; V

Fig. 41 is a sectional perspective showing the air inlet;

Fig. 5 is a longitudinal section through one form of hydraulic cylinder; and

Figs. 6 and 7 are perspective views of blocks which may be incorporated inthe furnace wall to define the air inlet and support the controlling parts.

The furnace 10 may have any desired number of air inlets to the combustion chamber above the fire bed. These may be arranged along the sides or at any other desired position. Each air inlet is shown as being defined by a series of apertured blocks 11, 12 and 13 which may be of fire brick, cast iron or any other suitable refractory or noncombustible material. The outer block 11, which is shown in perspective in Fig. 6, has a central partition 141 provided with an aperture 15 to support a nozzle or jet 16 for steam, compressed air, or other gaseous fluid. The intermediate and inner blocks 12 and 13 do not have this central partition and the jet is preferably located within the inner block. All three blocks have their respective passages of greater height at their outer edges than at the middle, in order to more effectively form the fan-shaped sheet of air over the fire bed as is pointed out in the Best patent above referred to.

The blocks, or at least the two outer blocks, may be connected by stay-bolts 17 which also serve as pivots for a pair of links 18 carrying the two closures 19 and 20 for the outer end of the air inlet. The two closure members may be brought together to prevent the admission of air-when the links are inclined as shown in Figs. 2 and 41, or they may be separated to permit the air admission when the links are brought to or toward vertical position. Preferably, each separate air inlet has its own pair of closures as shown in Fig. 2 instead of having one pair for the whole series of air inlets, as shown in the Best patent.

The several steam jets 16 may be supplied from a conduit 21 through branch pipes 22 and the conduit 21 may have a single valve 23 whereby the delivery to all of the jets may be controlled. The several pairs of closures may be operated simultaneously by mechanical connections such, for instance, as a rod 24: having depending branches 25 each connected to one end of one link of each closure. The movement of this rod not only controls all of the air inlet closures but also may serve to operate the steam valve 23.

As shown, the rod 24' has an upwardly extending branch having engagement with a slotted valve lever 27. The rod 24 has an essentially endwise movement but this movement includes a vertical component due to the swinging of the links 18 about their respective central pivots. The upward and endwise movement of the rod gives the necessary swing to the valve lever to turn on the steam atthe same time that the air inlets are uncovered and to close the steam valve as the air inlets are closed.

For operating this mechanism, I provide an hydraulic cylinder 30, the piston or plunger 31 of which has its piston rod substantially in line with and connected to the rod 24c. To permit the raising and lowering of the rod 24 hereinbefore referred to, the piston rod may have a transversely slotted head 32 as shown in Fig. 5, or the rod 24 may have a slotted head 33 as shown in Fig. 2. Any other suitable connections may be employed dependent upon the relative positioning of the rod 24 and the cylinder.

Although any suitable form of piston and cylinder construction may be employed, yet I prefer to employ a construction in which the length of the stroke may be readily varied at will. Thus, one piston and cylinder construction may be adapted to various different steam and air controlling mechanisms. As shown, the piston rod has an outer head or spider 34 carrying rods 35 telescoping with tubes 36 rigid with the cylinder head. The rods 35 may be threaded and carry stops 37 which may abut against the ends of the tubes 36 and limit the telescoping movement of the rods 35. I

The cylinder has only a single port 38 serving as both an inlet and exhaust and the piston rod is provided with suitable spring means whereby the piston may have a constant tendency to move toward said port when the fluid pressure is insulficient to re sist said tendency. As shown, the tubes carry a transverse bracket or spider 3:)

serving as a seat for one end of a coil spring 40, the other end seating against the spider 84:- The spring may be guided and held in position by guide rods 41 rigid with the spider 39 and slidable through the spider 34:. Any other suitable means might be employed for resiliently pressing the piston in one direction and limiting the length of the stroke. v

For use in connection with the mechanism above described, I provide means whereby the opening of the furnace door will cause or permit the delivery of a motive fluid to the cylinder 30 and the closing of the furnace door will permit a controlled escape of such fluid so that the steam and air supplies to the combustion chamber will be shut off after a predetermined interval following the closing of the door.

As a preferred embodiment of such mcch' and closing it upon the closing of said door..

Preferably, such mechanism permits a retarded valve movement so that the valve does not open until after the door is nearly to final opening position and does not close until the door is nearly shut. As illustrated, each door 48 has an upwardly extendingarm 4L9 adj acent to but spaced from the hinged edge of the door and terminating in an eye 50 through which extends a valve rod 51 connected to the valve stem 52. The valve rod 51 has adjustable stops 53 thereon which may be so positioned that after the door has opened part way, it engages one stop 53 to quickly close the water valve. By the arrangement shown, high pressure water will be delivered to the cylinder upon the opening of any one of the several furnace doors and this will instantly effect the delivery of aspirating steam and aspirated air to the combustion chamber. The closing of the door merely shuts oif the supply of water to the cylinder anddtraps therein the water previously supplie Somewhere in the system, between the valves 46 and the cylinder 30, I provide a small controlled bleed, such for instance, as a pipe 54: with a valve 55. This valve maybe set so that water will slowly escape therefrom but not at as great a rate as it can be supplied through the conduit 44 from the source of supply. Thus, the opening of a water valve will cause the piston 31 to be forced to the limiting'position away from the port38. When the water valve 46 is closed the spring 41 will cause the water in the cylinder to be slowly forced back through the pipe 47 and out the bleed. The

extent to whichthe bleed valve 55 is opened will control the time required for the closing of the steam and air inlets after the furnace.

door has been shut.

In Fig. 1 I have shown a cylinder 30 on each side of the furnace, water being supplied to both cylinders upon the opening of any furnace door. This is not an essential,

as the air and steam controllers might be.

divided up into as many sets as desired with each set operated by a separate cylinder, -or one cylinder may be so positioned as to operate all of the air and steam controllers.

Various other changes may be made without departing from the spirit or scope of my invention as defined in the appended claims.

I have spoken of the motive fluid for operating the pistons as water. It will of course be evident that any other motive fluid might be employed such, for instance, as steam or compressed air.

Having thus described my invention, What I claim as new and desire to secure by Let ters Patent is:

1. A furnace having an air inlet passage through the wall thereof from the atmosphere to the fire box above the fire bed, a nozzle extending into said inlet and adapted to deliver a jet of gaseous fluid through said inlet to induce the entrance of air to said fire box, a valve for controlling said fluid, two members disposed adjacent opposite sides of said nozzle for covering the outer end of said passage, a pair of links each pivotally supported intermediate its ends and each having its opposite ends connected to said members, a longitudinally and laterally movable rod, connections between said rod and said valve, and connections between said rod and one of said links whereby the five cents each,

movement of said rod controls the flow of said fluid and said air.

2. A furnace having an air inlet to the combustion chamber, a nozzle for inducing the entrance of air through said inlet, separate means for controlling the flow through said nozzle and through said inlet, a pressure cylinder adapted to receive a motive fluid, a piston, means whereby the movement of said piston operates both of said controlling means, and adjustable means for varying the length of the stroke of said piston.

3. A furnace having a cylinder, a piston therein, adjustable means for limiting the stroke of the piston, means for admitting fluid to said cylinder to effect the movement of the piston in one direction upon the swinging of the furnace door, means for automatically and slowly returning the piston to its initial position after the closing of the door, a plurality of air inlets, separate nozzles for each of said inlets, a reciprocatory member connected to said piston, and means operatively connected to said member for controlling the delivery of air and fluid through said inlets and nozzles respectively.

Signed at Wilmington in the county of New Castle and State of Delaware this 23rd day of Nov. A. D. 1917.

PIERCE C. STOOPES.

by addressing the Commissioner of Patents,

Washington, D. G. 

